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Lighting control system and method

  • US 6,495,973 B1
  • Filed: 07/17/2001
  • Issued: 12/17/2002
  • Est. Priority Date: 07/17/2001
  • Status: Expired due to Fees
First Claim
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1. A lighting control system for maintaining a predetermined light level within a lighting zone that is partially illuminated by natural light and partially illuminated by at least one electric light source, said system comprising:

  • a control unit having a central processing unit (CPU) positioned therein and electrically connected to an electrical power source and to said at least one electric light source, said CPU being adapted to store said predetermined light level and to deliver a predetermined initial amount of current to said at least one electric light source when said electric light source is activated;

    a sensor for sensing the level of light within said lighting zone, said sensor being electrically connected to said CPU and adapted to provide a sensed light level to said CPU;

    means in said CPU for comparing said sensed light level with said predetermined light level; and

    wherein said CPU is adapted to deliver an increased amount of current from said power source to said at least one electric light source if said sensed light level is less than said predetermined light level.

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